diff --git a/sqlspec/builder/_base.py b/sqlspec/builder/_base.py
index 65bee2ab6..b4a711191 100644
--- a/sqlspec/builder/_base.py
+++ b/sqlspec/builder/_base.py
@@ -4,7 +4,7 @@
 """
 
 import re
-from abc import ABC, abstractmethod
+from abc import abstractmethod
 from collections.abc import Callable, Iterable, Mapping
 from typing import Any, NoReturn, cast
 
@@ -115,7 +115,7 @@ def __hash__(self) -> int:
         return hash((self.sql, frozenset(self.parameters.items()), self.dialect))
 
 
-class QueryBuilder(ABC):
+class QueryBuilder:
     """Abstract base class for SQL query builders.
 
     Provides common functionality for dialect handling, parameter management,
diff --git a/sqlspec/core/filters.py b/sqlspec/core/filters.py
index 87c1c5f8e..4560fc9d3 100644
--- a/sqlspec/core/filters.py
+++ b/sqlspec/core/filters.py
@@ -18,7 +18,7 @@
     - Cacheable filter configurations
 """
 
-from abc import ABC, abstractmethod
+from abc import abstractmethod
 from collections import abc
 from datetime import datetime
 from typing import TYPE_CHECKING, Any, ClassVar, Generic, Literal, TypeAlias
@@ -68,7 +68,7 @@
 
 
 @mypyc_attr(allow_interpreted_subclasses=True)
-class StatementFilter(ABC):
+class StatementFilter:
     """Abstract base class for filters that can be appended to a statement."""
 
     __slots__ = ()
@@ -334,7 +334,7 @@ def on_or_after(self) -> datetime | None:
         return self._lower_value
 
 
-class InAnyFilter(StatementFilter, ABC, Generic[T]):
+class InAnyFilter(StatementFilter, Generic[T]):
     """Base class for collection-based filters that support ANY operations."""
 
     __slots__ = ("_field_name", "_values")
@@ -473,7 +473,7 @@ class NotAnyCollectionFilter(InAnyFilter[T]):
     _parameter_suffix: ClassVar[str] = "not_any"
 
 
-class PaginationFilter(StatementFilter, ABC):
+class PaginationFilter(StatementFilter):
     """Base class for pagination-related filters."""
 
     __slots__ = ()
diff --git a/sqlspec/core/result/_base.py b/sqlspec/core/result/_base.py
index 2258effcc..f2869ebae 100644
--- a/sqlspec/core/result/_base.py
+++ b/sqlspec/core/result/_base.py
@@ -9,8 +9,7 @@
     ArrowResult: Apache Arrow format results for data interchange.
 """
 
-from abc import ABC, abstractmethod
-from collections.abc import Iterable, Iterator, Sequence
+from abc import abstractmethod
 from typing import TYPE_CHECKING, Any, Final, Literal, cast, overload
 
 from mypy_extensions import mypyc_attr
@@ -42,6 +41,8 @@
 from sqlspec.utils.schema import to_schema
 
 if TYPE_CHECKING:
+    from collections.abc import Iterator, Sequence
+
     from sqlspec.core.compiler import OperationType
     from sqlspec.typing import ArrowReturnFormat, ArrowTable, PandasDataFrame, PolarsDataFrame, SchemaT
 
@@ -57,7 +58,7 @@
 
 
 @mypyc_attr(allow_interpreted_subclasses=False)
-class StatementResult(ABC, Iterable[Any]):
+class StatementResult:
     """Abstract base class for SQL statement execution results.
 
     Provides a common interface for handling different types of SQL operation
diff --git a/sqlspec/core/splitter.py b/sqlspec/core/splitter.py
index f6ab6710f..e27868f6f 100644
--- a/sqlspec/core/splitter.py
+++ b/sqlspec/core/splitter.py
@@ -16,7 +16,7 @@
 import logging
 import re
 import threading
-from abc import ABC, abstractmethod
+from abc import abstractmethod
 from collections.abc import Callable
 from enum import Enum
 from re import Pattern
@@ -141,7 +141,7 @@ def __repr__(self) -> str:
 
 
 @mypyc_attr(allow_interpreted_subclasses=False)
-class DialectConfig(ABC):
+class DialectConfig:
     """Abstract base class for SQL dialect configurations."""
 
     __slots__ = DIALECT_CONFIG_SLOTS
diff --git a/sqlspec/migrations/base.py b/sqlspec/migrations/base.py
index 5ec5cff76..a6245aef9 100644
--- a/sqlspec/migrations/base.py
+++ b/sqlspec/migrations/base.py
@@ -1,7 +1,7 @@
 """Base classes for SQLSpec migrations."""
 
 import os
-from abc import ABC, abstractmethod
+from abc import abstractmethod
 from pathlib import Path
 from typing import TYPE_CHECKING, Any, Generic, TypeVar, cast
 
@@ -71,7 +71,7 @@ class AppliedMigrationRecord(TypedDict):
 
 
 @mypyc_attr(allow_interpreted_subclasses=True)
-class BaseMigrationTracker(ABC, Generic[DriverT]):
+class BaseMigrationTracker(Generic[DriverT]):
     """Base class for migration version tracking."""
 
     __slots__ = ("_output_policy", "version_table", "version_table_name", "version_table_schema")
@@ -414,7 +414,7 @@ def _is_autocommit_error(self, exc: Exception) -> bool:
 
 
 @mypyc_attr(allow_interpreted_subclasses=True)
-class BaseMigrationCommands(ABC, Generic[ConfigT, DriverT]):
+class BaseMigrationCommands(Generic[ConfigT, DriverT]):
     """Base class for migration commands."""
 
     extension_configs: "dict[str, dict[str, Any]]"
diff --git a/sqlspec/migrations/loaders.py b/sqlspec/migrations/loaders.py
index fb1a2f326..7e1738f22 100644
--- a/sqlspec/migrations/loaders.py
+++ b/sqlspec/migrations/loaders.py
@@ -26,7 +26,7 @@ class MigrationLoadError(Exception):
     """Exception raised when migration loading fails."""
 
 
-class BaseMigrationLoader(abc.ABC):
+class BaseMigrationLoader:
     """Abstract base class for migration loaders."""
 
     __slots__ = ()
diff --git a/sqlspec/migrations/runner.py b/sqlspec/migrations/runner.py
index 2e84388c1..b3c9af134 100644
--- a/sqlspec/migrations/runner.py
+++ b/sqlspec/migrations/runner.py
@@ -5,7 +5,7 @@
 import logging
 import re
 import time
-from abc import ABC, abstractmethod
+from abc import abstractmethod
 from pathlib import Path
 from typing import TYPE_CHECKING, Any, Literal, cast, overload
 
@@ -57,7 +57,7 @@ def __init__(self, path: Path, extension_name: "str | None") -> None:
         self.extension_name = extension_name
 
 
-class BaseMigrationRunner(ABC):
+class BaseMigrationRunner:
     """Base migration runner with common functionality shared between sync and async implementations."""
 
     def __init__(
@@ -485,7 +485,7 @@ def should_use_transaction(
     def _resolve_default_schema(self) -> str | None:
         """Return the configured default schema for migration execution."""
         config = self.context.config if self.context else None
-        migration_config = cast("dict[str, Any]", getattr(config, "migration_config", None))
+        migration_config = cast("dict[str, Any] | None", getattr(config, "migration_config", None))
         return _resolve_default_schema(migration_config)
 
     def _resolve_use_transaction(self, migration: "LoadedMigrationMetadata", use_transaction: "bool | None") -> bool:
diff --git a/sqlspec/storage/backends/base.py b/sqlspec/storage/backends/base.py
index c05143723..55b1eb9cd 100644
--- a/sqlspec/storage/backends/base.py
+++ b/sqlspec/storage/backends/base.py
@@ -4,7 +4,7 @@
 import asyncio
 import builtins
 import contextlib
-from abc import ABC, abstractmethod
+from abc import abstractmethod
 from collections.abc import AsyncIterator, Iterator
 from typing import TYPE_CHECKING, Any, cast
 
@@ -137,7 +137,7 @@ def __anext__(self) -> Any:
 
 
 @mypyc_attr(allow_interpreted_subclasses=True)
-class ObjectStoreBase(ABC):
+class ObjectStoreBase:
     """Base class for storage backends.
 
     All synchronous methods follow the *_sync naming convention for consistency
diff --git a/sqlspec/utils/serializers/_json.py b/sqlspec/utils/serializers/_json.py
index ec174b92d..ce63f1055 100644
--- a/sqlspec/utils/serializers/_json.py
+++ b/sqlspec/utils/serializers/_json.py
@@ -6,7 +6,7 @@
 import json
 import threading
 import uuid as uuid_mod
-from abc import ABC, abstractmethod
+from abc import abstractmethod
 from collections.abc import Callable, Iterator, Mapping
 from decimal import Decimal
 from ipaddress import IPv4Address, IPv4Interface, IPv4Network, IPv6Address, IPv6Interface, IPv6Network
@@ -326,7 +326,7 @@ def decode(self, data: "str | bytes", *, decode_bytes: bool = True) -> Any:
         ...
 
 
-class BaseJSONSerializer(ABC):
+class BaseJSONSerializer:
     """Base class shared by JSON serializer implementations."""
 
     __slots__ = ()